/**
* @author AlbertDarren
* @contact 2563491540@qq.com
*/
#include <iostream>
#include <cmath>
using namespace std;
double round(double d,int digit)
{
    return floor(d*pow(10,digit)+0.5)/pow(10,digit);
}
int main_24()
{
    for (int i=1;i<=9 ;++i )
    {
        for (int j=0;j<=9 ;++j )
        {
            int aabb=i*1100+j*11;
            int ab=floor(sqrt(aabb)+0.5);
            if (ab*ab==aabb)
            {
                printf("%d\n",aabb);
            }
        }
    }
    const double PI=acos(-1);
    for (int i=0;i<10 ;++i )
    {
        printf("%.9lf\n",round(PI,i));
    }
    return 0;
}
